28172376 has 24 divisors (see below), whose sum is σ = 76300380. Its totient is φ = 9390768.

The previous prime is 28172359. The next prime is 28172377. The reversal of 28172376 is 67327182.

28172376 is a `hidden beast` number, since 281 + 7 + 2 + 376 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28172376.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28172377) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 195570 + ... + 195713.

Almost surely, 2^28172376 is an apocalyptic number.

It is an amenable number.

28172376 is an abundant number, since it is smaller than the sum of its proper divisors (48128004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28172376 is a wasteful number, since it uses less digits than its factorization.

28172376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391295 (or 391288 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 28172376 is about 5307.7656316006. The cubic root of 28172376 is about 304.2807597837.

The spelling of 28172376 in words is "twenty-eight million, one hundred seventy-two thousand, three hundred seventy-six".